<template>
  <div id="app">
    <router-view/>
  </div>
</template>

<script>
import jwt_decode from 'jwt-decode';
export default {
    name:'app',
    components:{},
    created(){
      //在页面加载时读取sessionStorage里的状态信息
      if (sessionStorage.getItem("store") ) {
        this.$store.replaceState(Object.assign({}, this.$store.state,JSON.parse(sessionStorage.getItem("store"))))
        this.$store.dispatch('setAuthenticated',null);
        this.$store.dispatch('setUser',null);
      }
      //在页面刷新时将vuex里的信息保存到sessionStorage里
      window.addEventListener("beforeunload",()=>{
        sessionStorage.setItem("store",JSON.stringify(this.$store.state))
      })
      if(localStorage.eleToken){
        //解析token
        const decoded=jwt_decode(localStorage.eleToken);
        //token存储到vuex
        this.$store.dispatch('setAuthenticated',!this.isEmpty(decoded));
        this.$store.dispatch('setUser',decoded);
      }
    },
    methods: {
      isEmpty(value){
          return (
              value === undefined||
              value === null ||
              (typeof value ==="object" && Object.keys(value).length===0)||
              (typeof value === "string" && value.trim().length===0)
          );
      },
      
    },
}
</script>


<style>
html,
body,
#app {
  width:100%;
  height:100%;
  padding-right:0 !important
}
@media only screen and (max-width:1000px){
  #app{
    width:1000px;
    height: 1000px;
    overflow: scroll;
  }
}
.el-loading-parent--hidden{
  overflow: none !important;
}

[v-cloak]{
  display: none;
}

/* http://meyerweb.com/eric/tools/css/reset/ 
   v2.0 | 20110126
   License: none (public domain)
*/

html, body,div,span, applet, object, iframe,
h1, h2, h3, h4, h5, h6, p, blockquote, pre,
a, abbr, acronym, address, big, cite, code,
del, dfn, em, img, ins, kbd, q, s, samp,
small, strike, strong, sub, sup, tt, var,
b, u, i, center,
dl, dt, dd, ol, ul, li,
fieldset, form, label, legend,
table, caption, tbody, tfoot, thead, tr, th, td,
article, aside, canvas, details, embed, 
figure, figcaption, footer, header, hgroup, 
menu, nav, output, ruby, section, summary,
time, mark, audio, video {
	margin: 0;
	padding: 0;
	border: 0;
	/* font-size: 100%;
	font: inherit; */
	vertical-align: baseline;
}
/* HTML5 display-role reset for older browsers */
article, aside, details, figcaption, figure, 
footer, header, hgroup, menu, nav, section {
	display: block;
}
body {
	line-height: 1;
}
ol, ul {
	list-style: none;
}
blockquote, q {
	quotes: none;
}
blockquote:before, blockquote:after,
q:before, q:after {
	content: '';
	content: none;
}
table {
	border-collapse: collapse;
	border-spacing: 0;
}

</style>
